Coffee maker



FIG. 1 is a front perspective view of a coffee maker showing my new design;

FIG. 2 is a front elevational view of the coffee maker shown in FIG. 1;

FIG. 3 is a left side elevational view of the coffee maker shown in FIG. 1, the right side being a mirror image of the left side;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a rear elevational view thereof.

The broken lines shown in the Figures are used for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a coffee maker, as shown and described. 